27.5-Inch/650B Wheel

Mountain adventure awaits
Marlin takes its cue from light, fast XC bikes. The right wheel size for each frame size, performance pedigree, and unbeatable ride feel make Marlin the perfect trail rider.
When you're ready for longer days on the bike, bigger challenges on the trail, and all the fun of the full mountain biking experience, you're ready for Marlin.
Key features
- Ride the fastest wheel that fits with Smart Wheel Size
- Ride-tuned aluminum frame is XC light, mountain tough
- Extended size range gives you a better fit for a better ride
- Backed by Trek's limited lifetime warranty

X-Caliber 9 is the top-end model in the X-Caliber family. It's a fully race-ready cross country mountain bike built with parts designed to compete. A RockShox Judy Silver fork with remote lockout, a Shimano drivetrain, and a wide-range cassette make it a great choice for fast singletrack riders who want a great bike that's ready to race right out of the box.
It's right for you if...
You measure your rides in speed and distance, and want a fast XC bike that will help you cover more trail in less time. You race, or you could see yourself getting into racing, so you want a hardtail with competition-level parts that can give you an advantage on the trail.
The tech you get
A lightweight Alpha Gold Aluminum frame, RockShox Judy Silver fork with remote lockout, Bontrager Kovee wheels, and Boost110 thru axle front hub all work together to give X-Caliber 9 exceptional handling. The Shimano XT/SLX 2x11 drivetrain has smaller jumps between gears and a clutch-equipped rear derailleur to reduce chain noise.
The final word
X-Caliber 9 is a speedy, nimble, and efficient XC hardtail that's perfect for riders with a racing pedigree and anyone who dreams of covering epic distances out on the trail.
Why you'll love it
- It's a great bike for someone who's just getting into serious racing: you get high-end XC parts on an awesome frame with enough cash left over for entry fees
- There's nothing as sweet as a silent ride: the clutch rear derailleur prevents chain slap, even in the rough
- Front and rear Boost hub spacing opens the door for high-end wheel upgrades
- The 31.6mm seat tube gives you the option to install a dropper post when you want to tackle rowdier terrain

Living legend
The bike that ruled the podium at the height of mountain bike racing is back to reclaim the top step. Refined and reinvigorated with new technology, Top Fuel is the fastest bike on the trail.
The better-than-ever Top Fuel is the fast, versatile choice for the cross country racer, marathon rider, and the entire Trek Factory Racing World Cup team.
Key features
- RE:aktiv XC: the smartest, fastest, most efficient shock ever
- Boost148/110: stronger wheels, more tire clearance, shorter stays
- Mino Link adjustable geometry lets you fine-tune your ride
- Exclusive suspension tech with ABP and Full Floater

The bike that ruled the podium at the height of mountain bike racing is back to reclaim the top step. Refined and reinvigorated with new technology, Top Fuel is the fastest bike on the trail.
The better-than-ever Top Fuel is the fast, versatile choice for the cross country racer, marathon rider, and the entire Trek Factory Racing World Cup team.
Key Features
- RE:aktiv XC: the smartest, fastest, most efficient shock ever
- Boost148/110: stronger wheels, more tire clearance, shorter stays
- Mino Link adjustable geometry lets you fine tune your ride
- Exclusive suspension tech with ABP & Full Floater

Bring on bigger
Remedy is the mountain biker's mountain bike. 27.5-inch wheels, an aggressive geometry, and a wealth of technical features make a bike that scores tens for capability.
Want to push harder? Want more travel? Need a more capable build? Remedy is your full suspension ride to the next level.
Key features
- Revolutionary new RE:aktiv with Thru Shaft damper: the most responsive shock available
- Stout 150mm frame optimized for enduro and technical trails
- Boost148/110: stronger wheels, more tire clearance, shorter stays
- Straight Shot stiffness, Knock Block frame defense

Living legend
The bike that ruled the podium at the height of mountain bike racing is back to reclaim the top step. Refined and reinvigorated with new technology, Top Fuel is the fastest bike on the trail.
The better-than-ever Top Fuel is the fast, versatile choice for the cross country racer, marathon rider, and the entire Trek Factory Racing World Cup team.
Key features
- RE:aktiv XC: the smartest, fastest, most efficient shock ever
- Boost148/110: stronger wheels, more tire clearance, shorter stays
- Mino Link adjustable geometry lets you fine-tune your ride
- Exclusive suspension tech with ABP and Full Floater

Marlin 5 is a trail-worthy daily rider that's perfectly suited for everyday adventures, on and off the trail. A front suspension fork with 100mm of travel, 21 speeds, and mounts for a rack and kickstand make it an ideal choice for new trail riders or anyone looking for a comfortable, stable commuter with the ruggedness of a real mountain bike.
It's right for you if...
You're new to the trail and want a serious mountain bike that doubles as a commuter—and you want it all at an exceptional value.
The tech you get
A lightweight Alpha Silver Aluminum frame, 21 speeds, a wide range of gearing so you never need to pedal too hard or easy on terrain that varies in elevation, hydraulic disc brakes that feel smoother than mechanical disc brakes, and a suspension fork with 100mm of travel—that's the same amount favored by most cross-country racers.
The final word
Built-in Trek's MTB heritage, and more than capable of taking on trail adventures. But it's also versatile. It's a popular ride on college campuses because the rack and kickstand mounts make it easy to accessorize and haul a load.
Why you'll love it
- It's a real mountain bike that's also perfectly suited to daily commutes, rides around campus, or just getting from A to B on any surface
- Smaller frame sizes (13.5" and 15.5") have short-reach brake levers that make it easier and more comfortable for riders with smaller hands to brake confidently
- It has separate brake and shift levers (a feature that's common on more expensive mountain bikes) so you can fine-tune the positioning for comfort
- Rack and kickstand mounts make it easy to accessorize, so your mountain bike can double as a rugged commuter
- Like every model in the Marlin family, it's backed by Trek's lifetime warranty

Marlin 6 is a quality introductory cross country mountain bike with front suspension, 24 speeds, and a wide range of gearing for easier pedaling on climbs. It's built in Trek's trail heritage, but also equipped with features like rack and fender mounts that make it a great choice for daily commuters.
It's right for you if...
You're testing the waters of off-road riding, and want a real mountain bike at a great value, with a wide range of gears to cover more ground on the road and trail.
The tech you get:
Marlin 6 has 24 speeds, a wide-range cassette so you can always find the right gear for your terrain, hydraulic disc brakes that feel smoother than mechanical disc brakes, and a 100mm suspension fork with a lockout feature—that's the same amount of travel favored by most cross country racers.
The final word:
Marlin 6 is built to stand up to the trail, but also equipped with rack and fender mounts and a wider range of gears that make it a great choice if your mountain bike doubles as your commuter.

Full of fast, built to last
Caution: X-Caliber will get you hooked. It packs all of Trek’s XC race hardtail experience into a light, fast bike that pairs the right wheel size with each frame size.
Nothing beats the efficiency, simplicity, and straight-up fun of an X-Cal hardtail in 29er or 27.5-inch. Great for XC racing, or simply shredding singletrack.
- All-new lightweight Alpha Gold Aluminum frame delivers a phenomenal ride quality
- Shorter chainstays and Boost141 hub spacing for increased agility and clearance for wider tires
- Updated geometry and E2 tapered head tube for more confident handling
- Sleek internal routing protects cables and accommodates dropper post upgrades

X-Caliber 8 is a cross country mountain bike made for fast laps and long days on the trail. It's built with special attention to value and the parts that make the biggest difference in performance. A Shimano drivetrain, RockShox fork, and hydraulic disc brakes make it a great choice for new mountain bikers and XC racers searching for fast, fun, singletrack adventure.
It's right for you if...
You're looking for a fast mountain bike for singletrack—one that's fully capable of taking on races, marathons, and competitive group rides. You want something that is reliable and fun with dependable, lightweight parts.
The tech you get
A lightweight Alpha Gold Aluminum frame, a RockShox 30 Silver suspension fork with a lockout and an air spring that's lighter and more adjustable than a coil spring, Bontrager Kovee Tubeless Ready wheels with Boost141 hub spacing, and a smooth, efficient Shimano Deore/XT 2x10 drivetrain with a Shimano XT Shadow rear derailleur, which stays tucked out of the way to avoid snagging on trail debris.
The final word
With X-Caliber 8, you're getting a performance frame paired with performance parts, like a RockShox air fork and a rear derailleur that's the gold standard for MTB performance and reliability. Plus, it's equipped with durable, lightweight alloy rims that save weight and are easy to upgrade to tubeless.
Why you'll love it
- It has the price of a more basic hardtail and the performance of a more expensive one
- The RockShox air fork can be tuned to the rider's weight, so you always have a custom ride that's right for you
- The frame is fully compatible with higher-end parts, like race wheels and a dropper post, if you ever find the need to upgrade
- Smart Wheel Sizing means you'll get the fastest wheel that fits (29" wheels on larger frames, 27.5" wheels on smaller frames)

X-Caliber 7 is the perfect entry point to fast cross country riding and racing. It's a fully capable hardtail mountain bike with expert tech where it matters most, like in the lightweight and durable alloy frame, 100mm RockShox fork, Shimano drivetrain, and hydraulic disc brakes.
It's right for you if...
You're new to mountain biking and want a high-value bike that's perfect for local XC trails and even racing. You want to invest in the parts that make a difference in performance—frame, suspension, and brakes—and want a bike you won't immediately outgrow as your skills advance.
The tech you get
X-Caliber 7 has a lightweight Alpha Gold Aluminum frame, RockShox fork with 100mm of travel and a lockout feature, a dependable 2x9 Shimano drivetrain, hydraulic disc brakes, and wider Boost141 hubs for increased wheel strength and better tire clearance. This hub size is standard for higher-end wheelsets, making it easy to upgrade your wheels if you're looking for a fast way to increase performance.
The final word
X-Caliber 7 is a great cross country mountain bike at a great value. It has the same features found on higher-end bikes—like internal cable routing, dropper post compatibility, a tapered head tube, and Boost hub spacing—all on a platform that's easy to upgrade down the line.
Why you'll love it
- It gets you into the world of cross country riding and racing at a great price, and it's a mountain bike that can grow with you as your skills advance
- The sleek internal cable routing gives you clean looks, protects your cables, and makes it easy to upgrade to a dropper post for even more capability
- Smart Wheel Sizing means you'll get the fastest wheel that fits (29? wheels on larger frames, 27.5? wheels on smaller frames)

Full of fast, built to last
Caution: X-Caliber will get you hooked. It packs all of Trek’s XC race hardtail experience into a light, fast bike that pairs the right wheel size with each frame size.
Nothing beats the efficiency, simplicity, and straight-up fun of an X-Cal hardtail in 29er or 27.5". Great for XC racing, or simply shredding singletrack.
- All-new lightweight Alpha Gold Aluminum frame delivers a phenomenal ride quality
- Shorter chainstays and Boost141 hub spacing for increased agility and clearance for wider tires
- Updated geometry and E2 tapered head tube for more confident handling
- Sleek internal routing protects cables and accommodates dropper post upgrades

Have fun. Get dirty.
The Skye's the limit for how far this mountain bike will take you. Every detail, from women's-specific touchpoints to optimized wheel size, is designed to ensure a fun, wild adventure on the trail.
However far you like to roam, Skye's confidence-inspiring ride will keep you smiling. Mountain biking is about adventure, staying fit, and having fun on the trail. With Skye, you can do it all.
Key features
- WSD: best-fitting women's MTB for confidence and comfort
- Ride the fastest wheel that fits with Smart Wheel Size
- Women's specific saddle, bars, and grips for ultimate comfort
- WSD Rider Right suspension is tuned for women

Trek's carbon Session 9.9 DH 27.5's sole focus is World Cup downhill domination. Period. This sleek gravity sled gets it done with 210mm of rear travel while weighing in around 35 pounds. Trek achieved a massive stiffness-to-weight ratio through the use of advanced carbon lay-ups and trussing. That formidable stiffness is enhanced by their 157x12mm rear through-axle, carbon EVO link, and of course, the Full Floater linkage and ABP rear end. For the fork, Fox delivers their dominating 40 FIT RC2 that's highly adjustable so you can tune it to your style or the course. Out back, Fox's DHX 2 SLS coil absorbs hits of all sizes. With race-dialed components like Saint gearing and brakes along with custom DT Swiss wheels wrapped in Bonty Team tires, its focus on the hot seat is crystal clear.

Full of fast, built to last
Caution: X-Caliber will get you hooked. It packs all of Trek’s XC race hardtail experience into a light, fast bike that pairs the right wheel size with each frame size.
Nothing beats the efficiency, simplicity, and straight-up fun of an X-Cal hardtail in 29er or 27.5". Great for XC racing, or simply shredding singletrack.
- All-new lightweight Alpha Gold Aluminum frame delivers a phenomenal ride quality
- Shorter chainstays and Boost141 hub spacing for increased agility and clearance for wider tires
- Updated geometry and E2 tapered head tube for more confident handling
- Sleek internal routing protects cables and accommodates dropper post upgrades

World Cup champion Session is proven to be the fastest downhill mountain bike. And with its amazing suspension, it’s the overall best downhiller the scene has ever seen.
You need a bike that will not only withstand the brutal demands of downhill, but excel at them. You need a proven winner on the World Cup circuit. You need Session.
Key Features
- Fast 27.5 wheels get you down the mountain first
- Exclusive suspension tech with ABP & Full Floater
- Mino Link adjustable geometry lets you fine tune your ride
- Internal routing & integrated frame protection